KR820002249B1 - Apparatus for stripping the carded web from the doffer cylinder of the textile carding machine - Google Patents

Abstract

An app. for conveting the carded web into a web comprises a carded web-stripper from a doffer cylinder of texture carding machine and a stripping roller coated with a scatteredly toothed metallic wire and a bare roll mounted respectively one after the other in the direction of movement of the web. By the combination of stripping roller and bare roller the web introduced to the card cloth of stripping roller and bare roller, the web introduced to the card cloth of stripping roller from dopper cylinder is not change the fiber distribution in web.

Description

Device for stripping carded webs from "helper cylinder" of spinning card machine

1 is a schematic side view of a roller group which is a main part of the present invention.

2 is a schematic side view showing the roller group and its driving unit together.

FIG. 3 is a side view schematically illustrating the arrangement of the present invention as shown in FIG. 1, illustrating the first step of "threading" the web,

FIG. 4 is an approximate side view similar to FIG. 3 showing the second stage of "threading" the web, ie the web being fed between the pair of rollers,

5 is an enlarged side view showing one specific case of the “metallic wire” in which the tooth teeth used in the present invention are spaced apart at certain intervals.

6 is a cross-sectional view of the metallic wire shown in FIG.

FIG. 7 is a side view similar to FIG. 5 showing another specific metallic wire used in the present invention.

8 is a cross-sectional view of the metallic wire shown in FIG.

FIG. 9 is another side view similar to FIG. 5 showing another specific metallic wire used in the present invention.

FIG. 10 shows a sectional view of the metallic wire shown in FIG.

The present invention provides a device for stripping carded webs from a doffer cylinder of a carding m / c and in particular a non-toothed tooth. Stripping rollers coated with special metallic wires, such as formed metallic wires (hereinafter referred to as `` scatteredly toothed metalic wires ''), and a pair of rollers each having a smooth surface; By means of the combination of the fibers distributed from the dopper cylinder's needle cloth to the stripping roller needle, the fiber distribution in the web delivered from this device is maintained without changing the fiber distribution in the web held by the stripping roller. It's about making it deliverable.

The present invention also provides for one auxiliary stripping roller in the region of the paired rollers described above so that the task of "threading" the web without using any manual steps when the card starts the card action can be executed automatically. have.

There are several types of roller-type doping devices that can be used to help and strip thin and uniformly distributed webs or fleece of carded fibers from the surface of the dopper cylinder.

In other words, there is a device that allows the web doped or stripped from the dopper cylinder in the form of a fragile but self-supporting web to be pulled through the trumpet by a calender roller and condensed into a sliver.

Doping devices of this type are for example shown in British Patent No. 941,843 (US Pat. No. 3,725,975).

The roller device of the device of British Patent 941,843 consists of the following combinations.

In other words, the stripper roller is actually rotated at the same surface speed as the doppler cylinder, and its teeth are located close to the teeth of the doppler cylinder, but are not arranged to work together. In addition, a means is provided for removing the fibers from the stripper rollers, a means consisting of a pair of rollers, one of which is a spiral roller, placed near the teeth of the stripper rollers and placed on the surface of the spiral from the stripper rollers. Transport the web to the rollers.

It also provides a means for rotating the spiral rollers in the same direction as the stripper rollers or at a speed greater than the surface speed so that the web running from the stripper rollers to the double rollers is subjected to the drift action.

In such a device, draping is necessary to separate the web from the rollers because the web is held firmly by the stripper rollers (such as flexible or metallic wires). For losing.

In addition to this, when "threading" a web between a pair of rollers, if the spiral roller does not initially peel off the web from the stripper-coated stripper roller, perform a "threading" step if the surface of the spiral roller is slightly moistened. It is usually sufficient to start the exfoliation required to do so.

However, in order to moisten the surface of the spiral roller, labor (manual work) is required.

It is also impossible for such a roller arrangement to transfer the web from the roller type doping apparatus in such a way that the fiber distribution can be maintained without changing the fiber distribution of the web held on the surface of the stripper roller.

Further fully automatic work of "threading" the web between a pair of rollers cannot be achieved using such a device.

In addition, a branch arrangement of the apparatus shown in British Patent No. 1,067,526 is as follows.

The pair of lower rollers are placed close to the lower surface of the stripper (or middle) rollers so that the card web can be pulled out of the stripper rollers.

Moreover, in this apparatus, the upper roller corresponding to the upper roller of the apparatus of British Patent No. 941,843 is replaced by a roller having a large number of spouts, where the sharp edge of the spherical part of the upper roller It is oriented and provided with means for rotating the upper and lower rollers such that the circumferential speed of the upper roller is slower than the circumferential speed of the stripper roller and the lower roller.

By forming edges at the end of the upper roller, the card web in the stripper roller can be folded and pulled when threading the web between the upper roller and the lower roller is performed.

By means of the action of the upper and lower rollers pulling the device, the card web on the stripper roller coated with hard teeth can be pulled out of the stripping roller by nips formed by the upper and lower rollers.

The resulting arrangement of fibers in the web is not substantially identical to the fibers in the web held on the surface of the stripper roller.

The aforementioned pulling action is indispensable in British patent 1,067,526, but the device of this invention still has the disadvantage of not being able to achieve a fully automatic "threading" operation.

If the web of soiled cotton is treated through this device, there is a defect, that is, if any impurities such as leaves or other foreign matter contained in the web accumulate in the demand of the upper roller after long use Will be produced.

The main object of the present invention is to make the web delivered from the roller apparatus of the present invention in such a state that the fiber arrangement can be maintained almost intact without changing the fiber arrangement of the web held on the surface of the stripping roller. This can be achieved by causing the lower roller of the roller apparatus of the present invention to rotate at substantially the same speed as the stripper roller.

An additional object of the present invention is to provide an automatic web threading device for carrying out the task of "threading" a web between a pair of upper rollers and a lower roller which is an auxiliary coated with a toothed metallic wire. By the action of the stripping roller.

The auxiliary roller is placed above the upper roller and close to the stripping roller covered with the toothed metallic wire so that the lower roller is rotated at a lower speed than the stripping roller while the upper roller rotates at substantially the same speed as the lower roller and the stripping roller. The upper roller is arranged so that there is a narrow space between the upper roller and the stripping roller. The configuration, operation, and effect of the present invention will be described in detail with reference to the accompanying drawings.

In Figure 1, the doping cylinder 1 and a pair of calendar rollers 7 and 8 are common rollers commonly used in spinning card machines. In the figure, the doping cylinder 1 rotates clockwise and the carded fleece W of the fiber placed on the doping cylinder 1 moves upwards from below the cylinder.

The stripping roller 2 is covered with a chamfered metallic wire 12, which is placed close to the doping cylinder 1, between the end of the metallic wire of the doping cylinder 1 and the end of the helical metallic wire 12 of the stripping roller 2. The distance should be 0.1 mm or 0.2 mm.

The drive mechanism is shown in FIG. 2, where the stripping roller 2 is designed to rotate in the same direction as the doping cylinder 1, and the surface speed of the stripping roller 2 should be about the same as the doping cylinder.

As shown in Figs. 5 to 8, the metallic wire 12 coated on the striping roller 2 has a different type of teeth than the special special concave-convex type, i.e., the convex-concave-convex, The web placed on the end of (12) can be easily moved because the end of the wire and the web are loosely related, as shown in the fifth, seventh and nineth degrees.

The angle (the obtuse angle) θ formed by the side of the tooth holding the fiber and the longitudinal direction of the wire is about 105 degrees to 135 degrees, and 110 degrees to 125 degrees is a more preferable angle.

The irregularities of the teeth shown in FIG. 5 are flat, as shown in FIG. 7, or the government sometimes has a rounded triangle, as in FIG.

The distance between the lengths between adjacent teeth of the metallic wire 12, ie the pitch, should be 4 to 7 times longer than the pitch of the metallic wire coated on the doping cylinder 1.

A pair of rollers 3 and 4 having a smooth surface are arranged after the stripping roller 2.

The lower roller 3 must be a particularly large roller, so that the surface is placed under the stripping roller, but the distance from the smooth surface of the lower roller 3 to the end of the metallic wire 12 of the stripping roller 2 is It should be about 2 to 6 mm, preferably 3-4 mm. This arrangement of the striping roller 2, the lower roller 3 and the doping cylinder 1 forms a triangular space portion under the stripping roller 2 between them.

The distance between the lower roller 3 and the end of the wire wound on the doping cylinder 1 should be 15-20 mm. An upper roller 4 with a smooth surface is placed on and near the lower roller and the distance between each surface of the upper and lower rollers is 0.1 mm-0.2 mm, while the surface of the upper roller 4 The distance between the ends of the metallic wire 12 wound on the stripping roller 2 should be 2-10 mm preferably 5-6 mm so that the web held on the metallic wire 12 is connected to the auxiliary stripping roller described below. It can be easily released from the stripping roller and separated.

In this way, the web released from the metallic wire can be attached on the surfaces of the upper and lower rollers 3 and 4.

Auxiliary stripping roller (5) wound with an inclined metallic wire (15) is disposed on the upper part of the upper roller (4), but the end of the metallic wire (15) and the metallic wire (12) of the stripping roller (2) The distance between the ends is narrowed to 0.1-0.2 mm, while the distance between the ends of the metallic wire 15 of the roller and the surface of the upper roller 4 is narrowed to 5-10 mm.

This distance between the auxiliary stripping rollers 5 and the upper rollers 4 permits the circulation of air in the zone located between the two rollers 4 and 5 and the left side of FIG. The upper roller 4 is in a normal position so that it can flow out and the web is wound around the upper roller 4 or an excessively thick portion is formed in the web passing through the nips of the lower and upper rollers. It should be appropriately selected to prevent the rotation of the auxiliary stripping roller 5 when it rises too much so that such a flow of air does not interfere.

In the above arrangement with respect to the auxiliary stripping roller 5, the lower roller 3 and the stripping roller 2, the area located between the auxiliary stripping roller 5 and the lower roller 3 is also divided into four quarters of the cylinder. The cylindrical surface of the stripping roller 2 occupying one is opposed.

The upper roller 4 and the auxiliary stripping roller 5 both rotate in the same direction as the stripping roller, while the surface speeds of the lower and upper rollers 3 and 4 are actually stripping rollers 2. )

However, only the surface speed of the auxiliary stripping roller is slower than that of the stripping roller (2), that is, to be 80% or less than the speed of the stripping roller (2). A surface speed of 40-60% of the speed is particularly good for this auxiliary stripping roller 5. The metallic wire 15 wound around the auxiliary stripping roller 5 may have an uneven appearance similar to that of the metallic wire 12. However, it is recommended that the obtuse angle θ formed by the fiber pizza side of the tooth and the wire length direction of the metallic wire 12 be about 5 degrees smaller than that of the metallic wire.

As an additional device, as shown in FIG. 1, an intake nozzle 11 is provided on the left side of the auxiliary stripping roller 5, and a shutter blade 13 is installed below the intake nozzle 11 to install a nozzle. The intake air flowing through the inside has no effect on the triangular space defined by the stripping roller 2, the lower and upper rollers 3 and 4, and the auxiliary stripping roller 5.

The clear roller 6 to be coated with the cleaning cloth is installed to be mounted on both surfaces of the auxiliary stripping roller 5 and the stripping roller 2 at the same time and in accordance with the rotation of the rollers 2 and 5. Rotate

In order to clean the surface of the lower and upper rollers (3) and (4), a "doctor blade" (9) is placed near the roller (4) and another doctor blade (10) is a roller (3). Each one is installed near) so that each roller can be cleaned. When the nips of the lower and upper rollers (3) and (4) and the pair of calendar rollers (7) and (8) are arranged in one plane, they are transferred from the nips of the lower and upper rollers at high speed to the calendar. The moving web fed to the roller nip does not show any wave movement and can also reduce the required tension to be applied to the web running between the upper and lower rollers and the dual calender roller.

During the normal working period of the card machine, the apparatus of the present invention operates as follows.

The web to be stripped off the surface of the doppler cylinder 1 by the stripping roller 2 and then the web to be carried along the bottom of the stripping roller is free of any attraction due to the special irregularities of the teeth of the metallic wire 12. Without the force of the stripping rollers 2 of the metallic wire 12 of the stripping roller alone is separated smoothly and soon loaded on the surface of the lower roller (3). The web supported by the lower roller 3 then moves along the outer circumferential surface of the lower roller 3 which is rotating at exactly the same speed as the stripping roller 2.

Thus, the arrangement and distribution of the fibers in the web mounted on the stripping roller 2 can remain unchanged, even if the web is just transferred from the nips of the lower and upper rollers 3 and 4. to be.

As can be understood from the above description, the main purpose of the present invention can be realized by utilizing the roller apparatus according to the present invention.

In case of replacing the above-described metallic wire 12 with the conventional toothed metal wire, a difficult problem will occur when the web is separated from the surface of the stripping roller and moved onto the surface of the lower roller. Therefore, the selection of the uneven shape suitable for the teeth of the metallic wire 12 is the most important.

As a result of various tests, the present inventors have invented the uneven shape best suited to the teeth of the metallic wire, i.e., the uneven shape is the metal wire 12 of the stripping roller 2 even when the web is moving at high speed. This allows the web to be easily displaced from the end of the metallic wire of the doppler cylinder (1) and also allows the web to be easily moved from the stripping roller (2) to the lower roller (3) without rupturing the web. .

The rupture of the web here is caused by a portion of the web which is separated from the stripping roller and is conveyed upwards with the end of the metallic wire 12 of the stripping roller.

The above tests were carried out by the present inventors under the following conditions.

(a) The irregularities of the teeth of the metallic wire 12 are triangular with a cut off as shown in FIG.

(b) The pitch of the metallic wire 12 is 9 mm.

(c) The obtuse angle θ formed by the side of the fiber gripping side and the length of the wire was selected at 90 degrees, 105 degrees, 110 degrees, 120 degrees, 125 degrees, and 135 degrees and tested at each of these angles.

(d) The length of the upper part of the cut triangle of the metallic wire 12 is 2 mm.

(e) Coiled pitch of adjacent metallic wires 12 mounted or wound on the cylinder of stripping roller 2 is 3 mm.

(f) The distance between the stripping roller 2 and the lower roller 3 is 3 mm.

(g) The distance between the stripping roller 2 and the upper roller 4 is 5.8 mm.

(h) The distance between the upper roller (4) and the auxiliary stripping roller (5) is 14 mm.

(i) The concave-convex shape of the teeth of the metallic wire 15 of the auxiliary stripping roller 5 has a truncated triangle as shown in FIG.

(j) The pitch of the metallic wire 15 is 9 mm.

(k) The obtuse angle θ formed by the fiber gripping side of the tooth and the longitudinal direction of the wire is 105 degrees.

(l) The length of the top of the cocked triangle of the tooth of metallic wire 15 is 2 mm.

(m) Coiled pitch of metallic wire 15 placed on cylinder of auxiliary stripping roller 5 is 3mm.

(n) The diameter of the dopper cylinder is 706 mm.

(o) Stripping roller 2 has a surface speed of 1.3% higher than doppler cylinder 1.

(p) The surface speeds of the stripping rollers 2 and the upper and lower rollers 4 and 3 are exactly the same.

(q) The surface speed of the auxiliary stripping roller 5 is 60% of the surface speed of the stripping roller 2.

(r) The speed of the dopper cylinder during the "threading" operation is eight times per minute.

(s) Doppler cylinder 1's rotational speed gradually changes from 8 revolutions per minute to 50 revolutions during normal working hours after completion of the "threading" of the web.

(t) The raw materials used are cotton and synthetic fibers.

(u) The fiber length is 38 mm

The results obtained by this test are shown in the following table.

TABLE 1

From the test results indicated in the above table, the following facts were confirmed. In other words, if a small obtuse angle θ is used, it is certain that the web is stripped from the hopper 1, but it is poor to separate the web from the stripping roller 2, resulting in the web being wrapped around the stripping roller 2.

Therefore, when the doppler cylinder rotates at a speed of about 50 RPM, the obtuse angle θ between the wire direction and the fiber gripping side of the metal wire 12 wound on the stripping roller 2 should be maintained within the range of 110 ° to 125 °. desirable. However, an obtuse angle θ of 105-135 degrees can also be used when the Doppler cylinder rotates at speeds below 30 RPM.

The work of "threading" the web between the lower and upper rollers 3 and 4 can be carried out by using a roller arrangement as shown in Figure 1, which describes the threading sequence of this work. The operation of "threading" the web between the lower and upper rollers is generally carried out when the carding machine is running continuously, as in the case of the speed of a conventional carding machine.

First, the web of the dopper cylinder 1 is stripped off by the metallic wire 12 of the stripping roller 2, wherein the obtuse angle θ of the tooth is to be penetrated by the metal wire 12 of the metal wire 12 into the web of the dopper cylinder 1 above. It must be kept at an angle. After that the web is frictionally held by the metallic wire 12.

Since the fibers in the web are entangled, the web sent from the doppler cylinder 1 to the stripping roller 2 then enters the zone where the secondary stripping roller 5 faces the stripping roller 2 at the closest distance. The web at the top of the stripping roller at is continuously stripped from the stripping roller 2 by the teeth of the metallic wire 15 having an obtuse angle θ. And this angle is 5 degrees or more smaller than the obtuse angle of 12 wires of metallic wire.

It is recommended that the rotational speed of the auxiliary stripping roller 5 be 80% or slightly less or preferably 40-60% of the speed of the stripping roller 2, so that the leading edge of the stripped web is the auxiliary stripping roller 5 Metallic wire 15 can be caught by the teeth. Since the surface of the auxiliary stripping roller 5 moves downwards where the above mentioned roller is close to the stripping roller 2, the leading edge of the web stops moving upwards by the end of the wire 15 of the auxiliary stripping roller 5. The leading edge is pushed back.

As a result, the web can reach a relaxed state as indicated in FIG. The auxiliary stripping roller 5 rotates with the leading edge of the web, so that the relaxed web W finally comes into contact with the surface of the upper roller 4. Thus, the web W in contact with the surface of the upper roller 4 is transported downward in accordance with the rotation of the upper roller 4 and then the web W comes into contact with the surface of the lower roller 3.

After the web W comes in contact with the upper and lower rollers 4 and 3 together, the web is folded into the hairpin by the upper and lower roller nips and finally transferred from the nip to the left as shown in FIG. At this stage, the "threading" operation is complete. If any part of the web is separated from the treated other part of the web and then remains in the metal wire 12's tooth rather than from the tooth, the remaining part of the web is removed from the stripping roller 2 to the auxiliary stripping roller 5. After being sent, it can be removed from the auxiliary stripping roller 5 by the intake air generated by the intake nozzle 11. The distance between the stripping roller 2 and the upper roller 4 shall be chosen to prevent the web associated with the metallic wire 12 above the stripping roller from separating from the wire 12.

As a result of the test conducted by the present inventors, it is not advantageous to "thread" the web between the upper roller and the lower roller when the distance described above is 0.3 mm, and when the distance is 2 mm, 80% success can be expected in the "threading". The distance is expected to be 95% success when the distance is 3mm and 100% success can be expected when the distance is 5-6㎜.

In order to increase the certainty of the "threading" operation, the present inventors wish to form a spiral requirement on the surface of the upper roller to increase the friction between the web W and the surface of the upper roller without disturbing the fundamental function of the "threading". It was found that such a request would be 0.8 mm deep and a helix pitch of 80-100 mm in length.

As is apparent from the above description, the surface speed of the auxiliary stripping roller 5 should be selected to be as follows. That is, before the leading edge of the web is affected by the intake nozzle 11, the web W is already subjected to the conveying action of the upper and lower rollers 4 and 3. The surface of the roller that comes into contact with the web W should be as wide as possible. According to the test result carried out by the present inventors, the following facts were confirmed.

That is, the "threading" operation could not be performed satisfactorily when the auxiliary stripping roller 5 was rotating at a speed of 80% of the surface speed of the stripping roller 2 or at the same speed as the surface speed of the stripping roller 2. However, when the auxiliary stripping roller 5 rotates to 70-80% of the surface speed of the stripping roller 2, a successful "threading" operation can be carried out, but many of the webs are sucked into the intake nozzle. And the best results could actually be achieved when the surface speed was maintained around 40-60% of the surface speed of stripping roller 2. While processing long fibers and synthetic fibers with good affinity for metallic wires, webs composed of such fibers, even if the teeth of metallic wire 12 are in any of the irregularities shown in degrees 5, 7, and 9 degrees W was not easily separated from the tip of the metallic wire 12 because the web W moves with the teeth.

On the other hand, while the fiber length was treated with short cotton fibers, the web W was sometimes separated from the metallic wire 12 of the stripping roller 2, but such separation is not always caused for all cotton fibers. That is, when the different types of cotton fibers were treated, the webs could not be separated from the metallic wires 12 or partially separated. Generally, in such a case, separating the web from the metallic wire 12 takes place simultaneously with the stripping of the web from the metallic wire of the doffer cylinder 1 by the metallic wire 12 of the stripping roller 2.

The dopper cylinder and the stripping roller rotate continuously so that the leading edge of the separated web is in contact with the other part of the next web held by the metallic wire of the dopper cylinder 1.

The leading edge of the web separated by the rotation of the Doppler Cylinder 1 and the stripping roller 2 is rolled into a single web. If the volume of the dried web bulk is too large, the surface of the dried web bulk will contact the upper surface of the roller 3. As a result, the dried webb is moved along and with the rotating surface of the lower roller 3 with support by the stripping roller 2.

The curled web bulge is heavy so that the "threading" of the web through the upper and lower rollers can be automatically affected by the rotation of the lower roller 3. If a web is forcibly pushed into the teeth of the stripping roller 2, such "threading" is not successful, which causes problems when the dried web mass is forced through the narrow space between the rollers. . After the web is raised up with the stripping roller 2, the web is stripped from the stripping roller 2 by the end of the auxiliary stripping roller 5.

In this step, the above-described "threading" operation by the auxiliary stripping roller 5 is carried out on the rolled up webb. Thus, when the separation of the web from the metallic wire 12 is caused throughout or in part over the web, the device of the present invention enables successful "threading" operations. Even when the distance between the dopper cylinder (1) and the lower roller (3) is about 20 mm, the rolled web mass is never moved down through the space between the dopper cylinder (1) and the lower roller (3) of the above-mentioned distance. The dried web mass is only conveyed towards the surface of the lower roller 3.

The distance 3-4 mm between the stripping rollers 2 and the lower rollers 3 is a distance which is practically suitable for easily carrying a large mass of dried webs.

In this way, the web delivered from the upper and lower rollers is passed through known pairs of calendar rollers 7 and 8 and then turned into slivers according to conventional methods. In this case, only one manual operation step is required.

Although the above-mentioned "threading" operation is carried out when the carding machine is operated at a low speed, the speed of the carding machine can increase the normal highway after completion of the "threading" operation.

In addition, while the carding machine is running at a very high speed, it is necessary to reliably remove the web from the hopper cylinder (1) and to safely transport the stripped web by the lower roller without being wrapped or ruptured by the stripping roller (2). Can be achieved.

In order to ensure that such conditions are performed reliably, the obtuse angle θ of the teeth of the metallic wire 12 wound on the stripping roller 2 should be appropriately selected.

According to the test results carried out by the present inventors, as shown in the above table, when the obtuse angle θ is between 90-105 degrees, an unfavorable state such as an increase in the amount of fibers exiting the web may be caused. Even after such a fiber can be removed from the wire of the auxiliary stripping roller 5 after it has been sent back by the roller 2, it is caused after a long running of the carding machine.

Some fibers separated from the web may be stripped by the auxiliary stripping rollers (5) after the web has been sent upwards by the stripping rollers (2), but sometimes such fibers may be removed at the speed of the auxiliary stripping rollers (5). When it is low, due to the accumulation of fibers in the area defined by the stripping roller (2) and the auxiliary stripping roller (5), it becomes a kind of curled fiber mass in the area under the auxiliary stripping roller (5). There is a time.

When the metallic wire 12 of the stripping roller 2 has an obtuse angle θ of the teeth of about 110 degrees, that is, such an angle is greater than the angle of the teeth of the metallic wire 15 of the auxiliary stripping roller 5 ( 5) When the degree is bigger, the dried fiber mass is not formed.

When the obtuse angle θ of the tooth of the metallic wire 12 of the auxiliary stripping roller 5 is 110-125 degrees, when the obtuse angle θ of the tooth of the metallic wire 12 of the stripping roller 2 is 90 degrees or more, and the When the former angle is about 5 degrees larger than the latter angle, the same state occurs.

In the present invention, a large diameter lower roller may be installed under the stripping roller so that the web peeled from the helper cylinder may be carried by the surface of the lower roller so that the fiber distribution in the peeled web remains unchanged. Therefore, such webs are not retracted or towed and a high quality sliver can be produced from the web delivered by the device of the present invention.

The fact that the web peeled off the doppler cylinder is not subjected to any draping or pulling will explain why the device of the invention does not cause the web to break and why a stable high-speed peeling of the web can be realized. This is because the web is not suspended from the surface of the stripping roller and the web does not rupture as a result of shortening the distance between both surfaces of the dopper cylinder 1 and the lower roller 3.

Furthermore, in the case of treating synthetic and cotton fibers without any additional manual work, automatic "threading" can be reliably performed. By setting the obtuse angle θ of the teeth of the metallic wire 12 of the auxiliary stripping roller 5 to be greater than 90 degrees but smaller than 5 degrees below the obtuse angle of the teeth of the metallic wire 12 of the stripping roller 2. It is possible to ensure a reliable peeling of the web from the stripping roller 2.

In addition, in the present invention, the fibers deviating from the web can be removed from the stripping roller 2 by the suction force of the intake nozzle 11 supported by the auxiliary stripping roller 5, which causes the fibers to curl. It means that no lumps are formed, and also, the stripping roller 2 can prevent the occurrence of wrapping of the web or the detachment of fibers.

Some variations of the roller arrangement shown in FIG. 1 may be considered without departing from the scope of the present invention. One example of such a modification is to replace the lower roller with a larger diameter in FIG. 1 with a smaller roller.

In addition to such a change, a guide plate of a suitable length can be horizontally installed in the space portion located between the lower roller and the doppler cylinder with a smaller diameter and under the stripping roller 2.

Claims (1)

Carding from a doping cylinder of a spinning carding machine having a doped cylinder with a needle wrapped around it in the direction of movement of the web and a roller device consisting of a stripping roller and a pair of upper and lower rollers with smooth surfaces. An apparatus for stripping a web, said stripping apparatus comprising: stripping a carded web from a helper by means of a roller arrangement configured by a combination of rollers having the following conditions. [next] (1) The stripping roller is covered with metallic wires with dispersed teeth, and is installed near the doppler cylinder. (2) The lower roller having a smooth surface and a large diameter is installed under the stripping roller, and the distance between the stripping roller and the lower roller is such that the surface of the moving web is in light contact with the lower roller. The speed of the lower roller and the speed of the stripping roller are substantially the same and are rotated in opposite directions. (3) The upper roller, which has a smooth surface in cooperation with the lower roller, is provided with a narrow gap between the upper roller and the stripping roller, and the web engaged with the metallic wire of the stripping roller is spaced therebetween. Within the above stripping rollers, the surface speed of the upper roller is substantially the same as the stripping roller. (4) A substripping roller covered with metallic wires having dispersed teeth is positioned above the upper roller and near the stripping roller, the surface speed of which is reduced to the stripping roller. Rotates more slowly and in the same direction.

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